Leaving the big story behind the documents to someone else, I just want to add a small detail. As you see, the earlier card is written in Fraktur (“Gothic”), while the latter in Antiqua (“Latin”) typeface. The difference is due to the fact that the Fraktur (“Schwabacher”) font widely used by German publishers was banned by the Führer with the 3rd January 1941 Reich Regulation (Normalschrifterlass), as he came to the conclusion that it was of Jewish origin. See Friedrich Beck: “Schwabacher Judenlettern” – im Schriftverruf Drittes Reich, 2006 (pdf) The deliciously well-informed post of the Hungarian Money Blog on fake Nazi stamps on various national banknotes recommends into the attention of its readers among others this signal to recognize the fake stamps dated to and after 1941.